Details
| Original language | English |
|---|---|
| Title of host publication | Multiscale Modeling of Heterogeneous Structures |
| Editors | Peter Wriggers, Olivier Allix, Jurica Soric |
| Publisher | Springer Verlag |
| Pages | 365-381 |
| Number of pages | 17 |
| ISBN (electronic) | 978-3-319-65463-8 |
| ISBN (print) | 9783319654621 |
| Publication status | Published - 2018 |
| Event | International Workshop on Multiscale Modeling of Heterogeneous Structures, MUMO 2016 - Dubrovnik, Croatia Duration: 21 Sept 2016 → 23 Sept 2016 |
Publication series
| Name | Lecture Notes in Applied and Computational Mechanics |
|---|---|
| Volume | 86 |
| ISSN (Print) | 1613-7736 |
Abstract
A continuum model for numerical simulation of hydrogen induced embrittlement of pipeline material is discussed within this work. For that, a transient hydrogen model considering trapping is coupled with an elasto-plastic material model considering von Mises yielding. The hydrogen enhanced plasticity (HELP) mechanism is assumed to be active within this problem statement and is realized by a hydrogen dependent reduction of the yield strength. An iterative numerical solution scheme is applied to solve the coupled problem. At the example of a pipeline with a blunted crack, the influence of hydrogen is investigated. A localized plastic zone is observed for high hydrogen concentrations, in line with the inherent phenomena of the HELP mechanism. However, when applying hydrogen boundary conditions which are considered to be realistic for an existing natural gas pipeline, no pronounced effect of hydrogen based on reducing the yield strength could be observed. Nevertheless, this numerical results do not imply a judgment if the HELP mechanism in general could be the prevalent mechanism for failure.
ASJC Scopus subject areas
- Engineering(all)
- Mechanical Engineering
- Computer Science(all)
- Computational Theory and Mathematics
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Multiscale Modeling of Heterogeneous Structures. ed. / Peter Wriggers; Olivier Allix; Jurica Soric. Springer Verlag, 2018. p. 365-381 (Lecture Notes in Applied and Computational Mechanics; Vol. 86).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Numerical simulation of hydrogen embrittlement at the example of a cracked pipeline
AU - Möhle, Milena
AU - Nackenhorst, Udo
AU - Allix, Olivier
N1 - Publisher Copyright: © Springer International Publishing AG 2018.
PY - 2018
Y1 - 2018
N2 - A continuum model for numerical simulation of hydrogen induced embrittlement of pipeline material is discussed within this work. For that, a transient hydrogen model considering trapping is coupled with an elasto-plastic material model considering von Mises yielding. The hydrogen enhanced plasticity (HELP) mechanism is assumed to be active within this problem statement and is realized by a hydrogen dependent reduction of the yield strength. An iterative numerical solution scheme is applied to solve the coupled problem. At the example of a pipeline with a blunted crack, the influence of hydrogen is investigated. A localized plastic zone is observed for high hydrogen concentrations, in line with the inherent phenomena of the HELP mechanism. However, when applying hydrogen boundary conditions which are considered to be realistic for an existing natural gas pipeline, no pronounced effect of hydrogen based on reducing the yield strength could be observed. Nevertheless, this numerical results do not imply a judgment if the HELP mechanism in general could be the prevalent mechanism for failure.
AB - A continuum model for numerical simulation of hydrogen induced embrittlement of pipeline material is discussed within this work. For that, a transient hydrogen model considering trapping is coupled with an elasto-plastic material model considering von Mises yielding. The hydrogen enhanced plasticity (HELP) mechanism is assumed to be active within this problem statement and is realized by a hydrogen dependent reduction of the yield strength. An iterative numerical solution scheme is applied to solve the coupled problem. At the example of a pipeline with a blunted crack, the influence of hydrogen is investigated. A localized plastic zone is observed for high hydrogen concentrations, in line with the inherent phenomena of the HELP mechanism. However, when applying hydrogen boundary conditions which are considered to be realistic for an existing natural gas pipeline, no pronounced effect of hydrogen based on reducing the yield strength could be observed. Nevertheless, this numerical results do not imply a judgment if the HELP mechanism in general could be the prevalent mechanism for failure.
UR - http://www.scopus.com/inward/record.url?scp=85037864226&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-65463-8_18
DO - 10.1007/978-3-319-65463-8_18
M3 - Conference contribution
AN - SCOPUS:85037864226
SN - 9783319654621
T3 - Lecture Notes in Applied and Computational Mechanics
SP - 365
EP - 381
BT - Multiscale Modeling of Heterogeneous Structures
A2 - Wriggers, Peter
A2 - Allix, Olivier
A2 - Soric, Jurica
PB - Springer Verlag
T2 - International Workshop on Multiscale Modeling of Heterogeneous Structures, MUMO 2016
Y2 - 21 September 2016 through 23 September 2016
ER -